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| author |   Geert Uytterhoeven <geert+renesas@glider.be> | 2018-02-23 14:38:36 +0100 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-02-28 15:30:00 +0100 |
| commit | 96c611c2b7bc897a6d16d58c76751f48707a4ac5 (patch) | |
| tree | f11c899eba93e9783c87d07a989b0e6fd27b02b0 /drivers/tty/serial | |
| parent | serial: sh-sci: Fix out-of-bounds access through DT alias (diff) | |
| download | linux-dev-96c611c2b7bc897a6d16d58c76751f48707a4ac5.tar.xz linux-dev-96c611c2b7bc897a6d16d58c76751f48707a4ac5.zip | |
serial: sirf: Fix out-of-bounds access through DT alias
The sirf_ports[] array is indexed using a value derived from the
"serialN" alias in DT, which may lead to an out-of-bounds access.
Fix this by adding a range check.
Fixes: a6ffe8966acbb66b ("serial: sirf: use dynamic method allocate uart structure")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/sirfsoc_uart.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/tty/serial/sirfsoc_uart.c b/drivers/tty/serial/sirfsoc_uart.c index 9925b00a9777..38622f2a30a9 100644 --- a/drivers/tty/serial/sirfsoc_uart.c +++ b/drivers/tty/serial/sirfsoc_uart.c @@ -1283,6 +1283,11 @@ static int sirfsoc_uart_probe(struct platform_device *pdev) goto err; } sirfport->port.line = of_alias_get_id(np, "serial"); + if (sirfport->port.line >= ARRAY_SIZE(sirf_ports)) { + dev_err(&pdev->dev, "serial%d out of range\n", + sirfport->port.line); + return -EINVAL; + } sirf_ports[sirfport->port.line] = sirfport; sirfport->port.iotype = UPIO_MEM; sirfport->port.flags = UPF_BOOT_AUTOCONF; |